To investigate a superspreading event at a fitness center in Hong Kong, China, we used genomic sequencing to analyze 102 reverse transcription PCR-confirmed cases of severe acute respiratory syndrome coronavirus 2 infection. Our finding highlights the risk for virus transmission in confined spaces with poor ventilation and limited public health interventions.
Keywords: 2019 novel coronavirus disease; COVID-19; China; Hong Kong; SARS-CoV-2; coronavirus disease; fitness center; molecular epidemiology; respiratory infections; severe acute respiratory syndrome coronavirus 2; superspread; transmission; viruses; zoonoses.